Improvement in ventilators



UNITED STATES PATENT OEE-ICE.,

JOHN B. HILL, OF JERSEY CITY, NEW JERSEY.

iMPRovEMENT IN VENTILAToRs.

Specification forming part of Letters Patent No. l 86,251, dated January16, 1877; application filed August 5, 1876.

`had to the accompanying drawings and the letters of reference markedthereon, which form a part of this specification, in which- Figure 1 isa central sectional elevation, showing the funnels, the outercylindrical por tion, the interior cylinder placed eccentric to theouter one, and the automatically-operating valvesA and theirconnecting-rod; and Fig. 2 is an end view, showing the projecting pipefor conducting the air from the car to the ventilator. Fig. 3 is an endview, and Fig. 4 a sectional elevation, of` a modified form of theventilator.

Corresponding letters are used to designate like parts in the severalgures.

This invention relates to what may be termed exhaust-ventilators, itbeing designed primarily for use upon railroad-cars and other vehiclesthat have a somewhat rapid move- -ment imparted to them; and it consistsin providing4 such ventilators with two automatically-operatin g valves,so arranged that in the act of opening onethe other is closed by meansof a positive connection, which extends from one to the other, itbeingof such length as to hold one in its openposition while the opposite oneis closed, and vice versa; and the invention further consists in certaincombinations and arrangements that will be more fully describedhereinafter.

Relieving railroad-cars, steam and other vessels, and especially waterclosets constructed in or upon such structures, from foul` `air is anacknowledged necessity, and the de vice herein described is designed toaccomplish such purpose; and to this end I construct the ventilator witha projecting pipe, A, which may be placed at a right angle to the bodythereof, or at such an angle as to admit of its passing through the wallor root` of the structure to which it is attached, and

leave the outer portion in line with the movement of the car.

The pipe or conduit A, communicates directly with the interior cylinderB, of the outer portion of the ventilator 5 -said cylinder or conduitbeing open at both its ends, except when closed by valves, soon .to bedescribed. This cylinder or conduitis placed eccentrically within anopen cylinder or casing, C, in order vthat the movement oi' the car, orother structure to which it is attached, may cause a current of air topass around all parts thereof, except the point where it is united tothe pipe or conduit A; the effect of which is to form a partial vacuumwithin and near the receding end of the cylinder, and thus to induce theoutow of any foul air that may have accumulated within the apartment,such foul air, as soon as it leaves the end of the cylinder,comingincontact with the current that is passing outside of the interiorcylinder or conduit B,and. within the outer cylinder or casing C; thedirections of the twocurrents being shown by arrows 2 and 3, in Figs. land 4 of the drawings, the arrows l, in same figures, indicating thedirection in which the ventilator is moving. i

Y To provide for the automatic closing of one of the valves and theopening of the other, when the direction in which theyare moving isreversed, and the consequent closing of one ofthe ends of the cylinderor conduit through which the foul air escapes, and the simultaneousopening of the other end thereof, the valves D Dl are hinged thereto,and are united by a rod, E, which is of such a length as to cause oneofthe valves to open when the opposite one is resting upon its seat, andas a consequence the apartment of the structure to which the ventilatoris attached is always in communication with a current of air between theouter portions of the ventilator, which causes said apartment to befreed from any ol'ensive or foul air, and leaves it in a condition to besupplied with fresh air from any available source. r

This device is particularly adapted ior use upon water-closets in carsand steam-propelled vessels, but will be found well adapted to anystructure which has suicientmovement imparted to it to form a current ofWind snicient to take out the foul air.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

The combination of the pipe or conduit A, the cylinders B and G, and theconnected automatically-moving valves D D', the parts being arranged tooperate, substantially als and for the purpose set forth.

In testimony that I claim the foregoing as my own I aijx my signature inpresence of two witnesses.

JOHN B. HILLL Witnesses:

JAMES CORRIGAN, CHARLES TAYLOR.

